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USNDP

12N (1975AJ02)


(See Energy Level Diagrams for 12N)

GENERAL: See also (1968AJ02) and Table 12.25 [Table of Energy Levels] (in PDF or PS).

Model calculations: (1973HA49, 1973KU1L, 1973SA30).

Muon and neutrino interactions: (1972KE06, 1972UB01).

Pion reactions: (1970HI10, 1970RA39, 1973BE1X, 1973UB01, 1974BO27, 1974EP02, 1974SE02).

Other topics: (1969GA1G, 1972AN05, 1972JA14, 1972OC01, 1973HA77, 1973RO1R, 1974IR04).

μ = +(0.4571 ± 0.0005) nm (1968SU05).

See also (1971SH26, 1972VA36, 1973KU1L, 1973MA1K, 1973SU1B, 1974HA2C).

1. 12N(β+)12C Qm = 17.344

The half-life of 12N is 10.97 ± 0.04 msec: see Table 12.28 (in PDF or PS) in (1968AJ02). 12N decays to 12C*(0, 4.44, 7.65, 10.3, 12.71, 15.11): see Table 12.24 (in PDF or PS).

2. 10B(3He, n)12N Qm = 1.569

Observed neutron groups are displayed in Table 12.26 (in PDF or PS) (1966ZA01, 1968AD03, 1970BO39, 1971ADZZ, 1974FU11). Angular distributions have been studied at E(3He) = 2.5 to 5.8 MeV (see (1968AJ02)), at 11 MeV (1970BO39: n0 and n to 12N*(5.3)) and at 12.5 and 13 MeV (1974FU11: to states shown in Table 12.26 (in PDF or PS) except 12N*(2.4)). See also (1970CH1G).

3. 12C(p, n)12N Qm = -18.126
Ethresh. = 19.658 ± 0.005 (1969OV01).
At Ep = 50 MeV neutron groups are reported to 12N states at Ex = 0, 1.0 ± 0.1, 3.7 ± 0.2, 4.2 ± 0.2, 5.3 ± 0.2 and 7.5 ± 0.3 MeV [compare with Table 12.25 (in PDF or PS)]. Angular measurements have been measured at Ep = 30.5 and 49.5 MeV for the two most energetic groups (1970CL01). See also (1969JU1A, 1970AM1A, 1970WI1B, 1973WA1K, 1975CA1W) and (1968AJ02).

4. 12C(3He, t)12N Qm = -17.362

Triton groups observed at E(3He) = 49.8 MeV are shown in Table 12.27 (in PDF or PS) (1968BA1E, 1969BA06). Angular distributions of inelastically scattered 3He to 12C*(15.11, 16.11, 16.58, 19.57) have been compared with those of the tritons to 12N*(0, 0.96, 1.19, 4.25). When the 3He cross sections are corrected for phase-space and isospin factors, the angular distributions are closely similar (to within 10%) to those for the triton groups, strongly suggesting isobaric analogues (1969BA06). Angular distributions have also been studied at E(3He) = 217 MeV (1974WI16: 0, 0.96, 3.53; partly resolved). See also (1970AR05, 1973PA1C).

5. 14N(p, t)12N Qm = -22.141

At Ep = 46 MeV triton groups are reported to 12N*(0, 0.97, 2.41, 3.50, 4.51, 5.13, 6.12, 7.13) (1968FO1C, 1968TO1E, 1969KI1C; abstracts). See also (1971KA04; theor.).

6. 16O(3He, 7Li)12N Qm = -22.058

See (1971DE37).